I've known Chad Fowler for almost ten years. He's a seriously good guy: musician, developer, leader, and friend. So when he came to me some years ago with an idea for a book, I jumped at it. I was hoping for something good, but what we got was something truly great.

Andy and I wrote The Pragmatic Programmer over 10 years ago. It was a book full of advice on the job of programming, from low-level coding to teams and projects.

Well, Chad had written the companion book. Where our book looked...